Avascular Necrosis: Difference between revisions
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== Clinical Presentation == | == Clinical Presentation == | ||
The symptoms include pain and loss of motion in the affected joint. In some cases, the condition is diagnosed during routine x-ray imaging, due to a lack of symptoms. [1]<br>The most common location for this condition to manifest, is the caput, collum of the femur, the humerus and the knee joint. [1] | |||
<br>avascular necrosis can be classified into 5 different stages; [2] | |||
<br>Stage 1: Radiographic changes are absent and MRI scan is required for identification. | |||
<br>Stage 2: First stage with radiographic changes. This stage is characterized by sclerosis of the superior central portion of the joint head. <br> | |||
Stage 3: In this stage, the articular surface is depressed so that the round contour is compromised, without being significantly deformed. | |||
<br>Stage 4: This stage is characterized by a wide collapse of the subchondral bone and destruction of the underlying trabecular pattern. This can lead to secondary arthritis. | |||
<br>Stage 5: The final stage where both articular surfaces are affected, which leads to a dysfunctional joint.<br> | |||
== Diagnostic Procedures == | == Diagnostic Procedures == | ||
Revision as of 19:39, 12 June 2011
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Definition/Description[edit | edit source]
avascular necrosis (also known as; osteonecrosis, bone infarction, aseptic necrosis, ischemic bone necrosis and AVN) is a condition where bone tissue dies due to a lack of blood supply. This decrease in blood supply causes a decrease in oxygen and nutrition delivery to the bone, which leads to multiple breaks in the bone and eventual collapse of the affected bone.
Mechanism of Injury / Pathological Process
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add text here relating to the mechanism of injury and/or pathology of the condition
Clinical Presentation[edit | edit source]
The symptoms include pain and loss of motion in the affected joint. In some cases, the condition is diagnosed during routine x-ray imaging, due to a lack of symptoms. [1]
The most common location for this condition to manifest, is the caput, collum of the femur, the humerus and the knee joint. [1]
avascular necrosis can be classified into 5 different stages; [2]
Stage 1: Radiographic changes are absent and MRI scan is required for identification.
Stage 2: First stage with radiographic changes. This stage is characterized by sclerosis of the superior central portion of the joint head.
Stage 3: In this stage, the articular surface is depressed so that the round contour is compromised, without being significantly deformed.
Stage 4: This stage is characterized by a wide collapse of the subchondral bone and destruction of the underlying trabecular pattern. This can lead to secondary arthritis.
Stage 5: The final stage where both articular surfaces are affected, which leads to a dysfunctional joint.
Diagnostic Procedures[edit | edit source]
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Outcome Measures[edit | edit source]
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Management / Interventions
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Differential Diagnosis
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Key Evidence[edit | edit source]
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Resources
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Case Studies[edit | edit source]
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Recent Related Research (from Pubmed)[edit | edit source]
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References[edit | edit source]
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